Sandblasting device



Sept. 5, 1944.

w. P. MQTT SAND BLASTING DEVICE Filed 0,012. 31, 1942 2 Sheets-Sheet l Sept. 5, 1944. w. P. MoTT SAND BLASTKING DEVICE Filed Oct. 5l, 1942 I 2 Sheets-Sheet 2 Patented Sept. 5, 1944 irs o? STATES ICE William P. Mott, `Chicago,"Illgassignorto M. Schatzv and Harryv R.1Grl ass'ern Joseph Applicationoetoifiersi,194g,serial.m4644131.1 1 v 6Claims. 51;;1'3)

The invention relatesto sand blastingy devices wherein castings or other articles to be cleaned are arranged to be subjected to sand blasts from jets so that dust, scales, or impurities are removed to provide the articles with a clean surface.

It is an object of the invention to provide a device which'is of inexpensive construction but highly efficient in operation.

A further object constitutes the provision of a device in which a plurality of jets are provided,

one of said jets being mounted for reciprocation so that every part of an article is positively subjected to the action of a blast.

Another object constitutes the provision of a barrel or cage for receiving the articles to be treated which tumbler is maintained in floating relation and rotated by its supporting means.

A still further object constitutes the arrangement of parts and details of construction tending to enhance the utility andY reliability of a Fig. 2 is a view from theline 2-2 of Fig. 1. y

Fig. 3 is a section on the line 3--3 of Fig. 2.

Fig. 4 is a section on the line 4--4 of Fig. 3.

Fig. 5 is a perspective view of a cage for holding the articles.

Referring to the various views of the drawings the device includes acabinet or casing generally designated by I0 having side Walls II, an end wall I2, a cover plate I3 and a door I4 hingedly secured to one side wall and provided with a window I5 to aiord visual examination of the interior of the cabinet.

Shafts I6 and I1 and I8 in parallel relation and defining a triangle extend between the side walls II. A belt I9 of rubber or other suitable material is trained around rollers 28 fast on said shafts I6, I1, and I8, the portion of the belt between shafts I6 and I8 being formed into a semi-circle to afford a seat for a cage generally designated by 2I in which the articles to be treated are received.

The cage comprises disks 22, which are connected by staves 23 and rings 24 hold the staves to the disks. The disks 22 are provided with a largedcentral 'open'ing-Z'and in concentric arrangement thereto with a circular series of apertures 26 to aiford egress for any sand or grit adhering to the disks 22 or rings 24.

In order to hold the cage 2| on the seat a roller 21 is secured to each side wall II and bears against the adjacent ring 24 to prevent the cage from leaving the arcuate portion of the belt I9.

The shafts I6, I1, and I8 project beyond the left side wall as viewed inv Fig. 2 and are provided with a gear 28 around which a chain belt 29 is'trained.

The shaft I8 also extends beyond the right side Wall and has a gear 3,0 secured thereto. A chain belt 3l is trained around the gear 30 and around a pinion 32 on the shaft of a re.

versible motor 33.

It is evident kthat the motor imparts drive to the shafts I6, I1, and I8 and consequently to the belt I9 which in turn causes rotation of the cage 2| maintained in floating position.

A motor driven suction fan 34 exhausts dusts and other impurities collecting in the cabinet.

Compressed air is supplied through a pipe 35 from which branch pipes 36, 31, and 38 provided with a valve 39 lead respectively to jets 40, 4I, and 42.

Pipes 43, 44, and 45 lead respectively from the jets 48, 4I,V and 42 to the bottom of the cabinet Where a supply of sand, grit, or other comminuted material is maintained.

Upon the compressed air escaping from the respective jets the sand is drawn into the'jets by induction and sprayed onto the articles in the cage 2I as shown in Fig. 3. A partition 46 Yin the cabinet provides a bin for the storing of the sand.

The jet 4I isconnected by a spring 4'I to one side wall II. To an arm 48 secured to the jet 4I is connected a cord 49 which is threaded through a bushing 58 on the right side Wall II of the cabinet as viewed in Fig. 2.

A bracket 5I is secured on' the outer side of the right side wall II which carries a pulley 52. The cord 48 is wound around the pulley 52 and is secured to a pin 53 on the gear 30.

It is evident that upon rotation of the gear 30 the nozzle 4I is moved to and fro so that every portion of an article is effectively reached by the blast.

While the drawings show one embodiment of the invention numerous changes and alterations may be made without departing from the spirit of the invention.

I, therefore, wish to includeall changes and i cage in floating position and rotating said cage,`

and means for delivering a sand blast to said cage.

3. In a sand blasting device, a casingaY cage in said casing adapted to retain the articles to be treated, a belt trained around rollers in said casing, said belt being slacked to alord a seat for said cage, means for imparting movement to said belt, and means for imparting sand blasts to said cage.

4. In a sand blasting device, a casing, a cage in said casing adapted to retain the articles to be treated, a belt trained around rollers in said casing, said belt being arranged to support said cage, means for holding said cage to said belt, means for imparting movement to said belt, and means for imparting sand blasts to said cage.

5. In a sand blasting device, a casing, a cage in said casing adapted to retain the articles to be treated, means for floatingly supporting said cage and imparting rotation thereto, a nozzle discharging a sand blast onto said cage, and means for reciprocating said nozzle.

6In a sand blasting device, a casing, a cage in said casing adapted to retain thearticles to be treated, a belt trained around rollers in said casing, said belt being arranged to support said cage, means for imparting a drive to said belt, a nozzle discharging a sand blast onto said cage, and means controlled by said driving means for reciprocating said nozzle.

' WILLIAM P. MOTT. 

